Additional file 1: of Insights into the segmental identity of post-oral commissures and pharyngeal nerves in Onychophora based on retrograde fills
2015-08-25T05:00:00Z (GMT) by
Scenario on the evolution of the arthropod brain. Animation, swf file. Anterior is up. The compound brain of arthropods (sensu Richter et al. ) most likely evolved by a fusion of initially separate proto-, deuto- and tritocerebral ganglia. Note that the tripartite brain of arthropods alternatively might have evolved several times independently, as some groups, including branchiopod crustaceans, show a bipartite brain (e.g. ).